docs: def patch(self):
          """
          monkey patches django.db.models.sql.compiler.SQL*Compiler series
          """
          from django.db.models.sql import compiler
  
          self._read_compilers = (
              compiler.SQLCompiler,
              compiler.SQLAggregateCompiler,
              compiler.SQLDateCompiler,
          )
          self._write_compilers = (
              compiler.SQLInsertCompiler,
              compiler.SQLDeleteCompiler,
              compiler.SQLUpdateCompiler,
          )
          if not self._patched:
              self._original = {}
              for reader in self._read_compilers:
                  self._original[reader] = reader.execute_sql
                  reader.execute_sql = self._monkey_select(reader.execute_sql)
              for updater in self._write_compilers:
                  self._original[updater] = updater.execute_sql
                  updater.execute_sql = self._monkey_write(updater.execute_sql)
              self._patched = True
              self.cache_backend.patch()
              self._handle_signals()